Twin-unit heater



Oct. 21, 1930. SEELERT 1,778,732

TWIN UNIT HEATER Filed Nov. 18, 1929 2 Sheets-Sheet l Jaw/ 002 My;

Oct. 21, 1930. E S T 1,778,732

TWIN UNIT HEATER Filed Nov. 18, 1929 2 Sheets-Sheet 2 Patented Oct. 21, 1930 1,778,732

UNITED STATES PATENT OFFICE EDWARD H. SEELERT, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO McQUAY RADIATOR CORPORATION, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF DELAWARE TWIN-UNIT HEATER Application filed November 18, 1929. Serial No. 407,906.

My present invention has for its object the provision of an extremely simple and highly eiiicient twin unit heater intended for general use and to this end, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claims.

In the accompanying drawings, which 1 llustrate the invention, like characters ndlcate like parts throughout the several Views.

Referring to the drawings:

Fig. 1 is a view of the twin un t heater partly in side elevation and partly 1n long tudinal central section; and

Fig. 2 is an end elevation of the same.

The numeral 3 indicates an upright floor stand or air intake conduit on the upper end of which is mounted and rigidly secured a rectangular casing 4 having an open bottom affording an air intake opening WhlCl'l leads from said conduit. The fan housings 5 are mounted on the top of the casing 4 at the ends thereof spaced the one from the other, and the top of the casing 4 between said housings affords a motor base 6. An annular fan eye 7 is formed in the front end of each housing 5 and extends downwardly into the casing 4. Surrounding the eyes 7 are inwardly extended and inwardly contracted annular shrouds 8 secured to the casing 4 and fan housings 5. The backs of the fan housings 5 are upwardly and forwardly inclined to afford deflectors 9. Longitudinal tie-members 1.0 connect the housings 5 at the tops thereof. I

Extending horizontally through the casing 4 is a radiator 11 of the automobile type and which radiator divides said casing into upper and lower compartments 12 and 13, respectively. Said radiator 11, at its ends, is held in mountings 14 on the ends of the casing 4. The intake and outlet of the radiator 11 are indicated by the numerals 15 and 16, respectively, and said radiator is inclined for proper drainage. Any desired medium may be provided for heating the radiator 11 such as steam, vapor, hot water and the like.

A transverse upright haflie 17 extends between the radiator 11 and top of the casing 4 and midway between the two housings 5. Mounted at the back of each eye and within the flange 8 surrounding the same is an ex-- haiist fan 18. The fans 18 are secured to the outer ends of a pair of horizontal axially aligned shafts 19 journaled just back of the hubs of the fans 18 in bearings 20 on transverse channel bars 21 secured in the fan housings 5 at the bottoms thereof. A pair of electric motors 22, mounted on the motor base 6, are provided for independently operating the fans 18 and are connected by flexible couplings -23 to the rear ends of the shafts 19 outwardly of the fan housings 5.

A shutter is provided for each eye 7 and comprises a plurality of vertically spaced horizontal slats 24 having on their ends trunmons journaled in upright frame bars 25 secured to the respective ends of the easmg 4 and housings 5 at the outer faces thereof. These slats 24 are independently mounted and frictionallyheld in position and may be individually moved into positions to completely or partially close the eyes 7 and when open may be set at various different angles for deflecting the hot air discharged by the fans 18 in the desired direction. By independently operating'the fans 18 the desired amount of air to be heated may be drawn upward through the radiator 11 and the reversely arranged fans 18 will hot air in opposite directions from a given point and thereby more efliciently and evenly heat the roomin which the twin unit heater is mounted.

The baflie prevents the fans 18 from drawing air into the housings 5 except through the radiator 11, it prevents one of said fans from acting against the other and it also prevents one of the fans 18 when operating from drawing air through the eye for the other fan when not operating. Said baflie 17 further prevents either fan 18 from drawing air upward through the radiator 11 except through the section thereof over which it is mounted.

Obviously, the fans 18 draw air from the lower compartment 13 upward through the respective sections of the radiator 11 into the upper compartment 12, into the housings 5 and discharges the same into the room through the eyes 7.

discharge the What I claim is:

1. A twin unit heater comprising a casing having at its bottom an air intake opening, a substantially horizontally disposed radiator in the casing dividing the same into upper and lower compartments, two fan housings on the casing into which the upper compartment opens, each of said housings having a fan eye, a fan at each eye, and an individual electric motor for operating said fan for drawing air upwardly through the radiator and the respective housing and discharging the same through the eye in which said fan is mounted.

2. A twin unit heater comprising a casing having at its bottom an air intake opening, a substantially horizontally disposed radiator in the casing dividing the same into upper and lower compartments, two fan housings on the casing at the ends thereof and into which the upper compartment opens, said housings being spaced apart, the casing between the fan housings affording a motor base, each fan housing having a fan eye in its front, the backs of the fan housings being up wardly and forwardly inclined to afiord deflectors, two fans at the eyes, a pair of horizontally aligned shafts on the front ends of which the fans are mounted, two electric motors mounted on the motor base and connected one to each of said shafts, and shutters for the eyes.

In testimony whereof I aflix my signature.

EDWARD H. SEELERT. 

